<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title></title>
  </head>
  <body>
    <Script type="text/javascript">
       function tulin(say){
         switch (say) {
           case '土豆':
             console.log('哟');
             break;
          case '哟':
           console.log('切克闹');
           break;
           default:

         }

       }
       tulin("土豆")
       tulin("哟")
      </script>

    </script>
  </body>
  </html>
